"I have played Mr. Kalsbeek’s instruments in several occasions: recitals, continuo playing for chamber music, opera performances. All his instruments are fine, solid and well characterized from the original model. Very easy to play and with a nice sound, Mr. Kalsbeek’s instruments are a good help for the modern performer’s life. "
"With great pleasure I have played instruments made by Jan Kalsbeek in concerts and recordings. His perfectionism and fine craftsmanship, combined with thorough knowledge of the construction of the original harpsichords can be heard - and seen - in his beautiful instruments. "
"Jan has built a clutch of harpsichords for the outstanding hire and tuning professional Ken Smith, which I have had the pleasure of using. They are good, robust instruments with a tone that carries excellently in the opera house and support the voice. "
"Jan Kalsbeek was the craftsman who brought our Mietke harpsichord into being. Jan was easy to contact. He kept to our contract and delivered on time for our 2010-2011 season. Even though Jan has created other models of the Mietke, each instrument is unique. Our harpsichord fits our acoustical spaces like a dream. "
"I wanted to take a moment or two to thank you for the absolute pleasure I felt in playing your marvellous double-manual Mietke copy. It sang and danced with me for the whole evening of my recital, and it taught me a great deal as well. The best kind of instrument is the one that lets you express your artistic vision while revealing itself as a work of art. Thank you for your dedication to this craft. "